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STATEMENTS OF CONSOLIDATED CHANGES IN EQUITY - USD ($)
$ in Millions
Total
Series C Preferred Stock
Series A Preferred Stock
Series B Preferred Stock
Cumulative Preferred Stock
Cumulative Preferred Stock
Series C Preferred Stock
Cumulative Preferred Stock
Series B and Series C Preferred Stock
Common Stock
Additional Paid-in-Capital
Additional Paid-in-Capital
Series B and Series C Preferred Stock
Retained Earnings (Accumulated Deficit)
Retained Earnings (Accumulated Deficit)
Cumulative Effect, Period of Adoption, Adjustment
Retained Earnings (Accumulated Deficit)
Series C Preferred Stock
Retained Earnings (Accumulated Deficit)
Series A Preferred Stock
Retained Earnings (Accumulated Deficit)
Series B Preferred Stock
Accumulated Other Comprehensive Loss
Balance, beginning of period (in shares) at Dec. 31, 2019         2,000,000                      
Balance, beginning of year at Dec. 31, 2019         $ 1,740     $ 5 $ 6,080   $ 632 $ (7)       $ (98)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                
Stock issued (in shares)           1,000,000   48,000,000                
Stock issued           $ 723   $ 1 672              
Conversion of Series B Preferred Stock and Series C Preferred Stock (in shares)             0                  
Conversion of Series B Preferred Stock and Series C Preferred Stock             $ (100)     $ 100            
Balance, end of year (in shares) at Dec. 31, 2020 2,402,400 625,000 800,000 977,400 3,000,000                      
Balance, beginning of year (in shares) at Dec. 31, 2019               502,000,000                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                
Issuance related to benefit and investment plans (in shares)               1,000,000                
Issuances related to benefit and investment plans               $ 0 30              
Recognition of beneficial conversion feature $ 32               32              
Net income (loss) (773)                   (773)          
Common Stock dividends declared (see Note 12)                     (480)          
Preferred stock dividends declared                         $ (27) $ (73) $ (85)  
Amortization of beneficial conversion feature (32)                   (32)          
Other comprehensive income                               8
Balance, end of year (in shares) at Dec. 31, 2020               551,000,000                
Balance, end of year at Dec. 31, 2020 $ 8,348       $ 2,363     $ 6 6,914   (845)         (90)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                
Stock issued (in shares)           0   77,000,000                
Stock issued           $ 0   $ 0 1              
Conversion of Series B Preferred Stock and Series C Preferred Stock (in shares)             (2,000,000)                  
Conversion of Series B Preferred Stock and Series C Preferred Stock             $ (1,573)     1,573            
Balance, end of year (in shares) at Dec. 31, 2021 800,000 0 800,000 0 1,000,000                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                
Issuance related to benefit and investment plans (in shares)               1,000,000                
Issuances related to benefit and investment plans               $ 0 41              
Recognition of beneficial conversion feature $ 0               0              
Net income (loss) 1,486                   1,486          
Common Stock dividends declared (see Note 12)                     (404)          
Preferred stock dividends declared                         0 (49) (34)  
Amortization of beneficial conversion feature $ 0                   0          
Other comprehensive income                               26
Balance, end of year (in shares) at Dec. 31, 2021 628,923,534             629,000,000                
Balance, end of year at Dec. 31, 2021 $ 9,415       $ 790     $ 6 8,529   154         (64)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                
Stock issued (in shares)           0   0                
Stock issued           $ 0   $ 0 0              
Conversion of Series B Preferred Stock and Series C Preferred Stock (in shares)             0                  
Conversion of Series B Preferred Stock and Series C Preferred Stock             $ 0     $ 0            
Balance, end of year (in shares) at Dec. 31, 2022 800,000 0 800,000 0 1,000,000                      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                                
Issuance related to benefit and investment plans (in shares)               1,000,000                
Issuances related to benefit and investment plans               $ 0 39              
Recognition of beneficial conversion feature $ 0               0              
Net income (loss) 1,057                   1,057          
Common Stock dividends declared (see Note 12)                     (453)          
Preferred stock dividends declared                         $ 0 $ (49) $ 0  
Amortization of beneficial conversion feature $ 0                   0          
Other comprehensive income                               33
Balance, end of year (in shares) at Dec. 31, 2022 629,535,631             630,000,000                
Balance, end of year at Dec. 31, 2022 $ 10,042       $ 790     $ 6 $ 8,568   $ 709         $ (31)